Secondary battery electrode, and method for producing same
摘要
說(shuō)明書
In a substantial example described above, the carbon precursor may serve as a binder in the molded body. In this case, even after the carbon precursor converted into carbon by heat treatment, the active materials may be bound to each other to provide a conductive path, and to produce the carbon-based active material bulk composed of a carbon-based material, which are advantageous. In addition, the carbon-based active material bulk may be prepared with low-priced plate graphite instead of high-priced spherical graphite, as a carbon-based electrode active material. When an electrode is produced using plate graphite by a general electrode production method, scale-shaped graphite is oriented in a direction parallel to a current collector by rolling, and thus, electrolyte solution impregnation becomes difficult in a vertical direction to the electrode or a charge/discharge rate characteristic is decreased by a slowdown phenomenon. However, when the production method according to exemplary embodiment of the present invention is used, a cutting direction of the active material bulk is adjusted when producing an electrode using plate graphite, whereby the scale-shaped graphite has an orientation in vertical direction the electrode current collector, and thus, electrolyte solution impregnation becomes easy and a battery reaction rate may be improved. In addition, a pore forming agent and/or a pore retention structure may be used during the orientation, or porosity may be adjusted using molding pressure and the like, and thus, the conventional problem when using scale-shaped graphite may be solved and the method of the present invention is commercially advantageous.
